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PINCH-OFFA pinch-off is needed when the parison falls outside the cavity of the mold. It is the protruding edge separating the cavity from the flash pocket, and it compresses the flash to the point of severanc [..]
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PINCH-OFFA raised edge around the cavity in the mold, which seals off the part and separates the excess material as the mold closes around the parison in the extrusion blow molding operation.
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